From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CB254C369D3 for ; Wed, 25 Sep 2024 11:50:16 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 800FA10E969; Wed, 25 Sep 2024 11:50:16 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="KyUZdst3"; dkim-atps=neutral Received: from nyc.source.kernel.org (nyc.source.kernel.org [147.75.193.91]) by gabe.freedesktop.org (Postfix) with ESMTPS id 05BAE10E969; Wed, 25 Sep 2024 11:50:16 +0000 (UTC) Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id E4B21A43FD3; Wed, 25 Sep 2024 11:50:06 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C4726C4CEC3; Wed, 25 Sep 2024 11:50:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1727265014; bh=lw4Lfqx1k+k9pvCiV4drdU+7jyHe71CV9Nn//3wN524=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KyUZdst3q49QeF7uhuCh5MQygSpfbZpnEDXmoiGdZm/Qwcbqvd5kVBGx6aCQAXQE3 3GNBsrmnWHJydvr72C0/7l9YulZ9h30XpWXyxyHV3hZ3xm4Kd2znqzDhlkzFdvVvPe GB7kekZOrMGJWFZ8wGgaqNtWNK0tVkIYdbb13rCAfZxXsUezHkN1jFNz2AY3vmR5ap qbdhL5l0svFkqa6zg3ocWp3HGvzRVgcL41XEthzzU+xIUO/BDI9WryS8dq9+RLIJR6 u+pTvQgaej1gzZpSfwNysrukDg/N79Pft2TyUCp5YMYp0Y8xk5l6B/j8iAlzn0VURz 8XJbOGbVDb3wQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Alex Hung , Wenjing Liu , Daniel Wheeler , Rodrigo Siqueira , Alex Deucher , Sasha Levin , harry.wentland@amd.com, sunpeng.li@amd.com, Rodrigo.Siqueira@amd.com, christian.koenig@amd.com, Xinhui.Pan@amd.com, airlied@gmail.com, daniel@ffwll.ch, roman.li@amd.com, hersenxs.wu@amd.com, george.shen@amd.com, stylon.wang@amd.com, allen.pan@amd.com, meenakshikumar.somasundaram@amd.com, michael.strauss@amd.com, aric.cyr@amd.com, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 6.11 194/244] drm/amd/display: Avoid overflow assignment in link_dp_cts Date: Wed, 25 Sep 2024 07:26:55 -0400 Message-ID: <20240925113641.1297102-194-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240925113641.1297102-1-sashal@kernel.org> References: <20240925113641.1297102-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.11 Content-Transfer-Encoding: 8bit X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" From: Alex Hung [ Upstream commit a15268787b79fd183dd526cc16bec9af4f4e49a1 ] sampling_rate is an uint8_t but is assigned an unsigned int, and thus it can overflow. As a result, sampling_rate is changed to uint32_t. Similarly, LINK_QUAL_PATTERN_SET has a size of 2 bits, and it should only be assigned to a value less or equal than 4. This fixes 2 INTEGER_OVERFLOW issues reported by Coverity. Signed-off-by: Alex Hung Reviewed-by: Wenjing Liu Tested-by: Daniel Wheeler Signed-off-by: Rodrigo Siqueira Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/display/dc/dc_dp_types.h | 2 +- drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_cts.c | 3 ++- drivers/gpu/drm/amd/display/include/dpcd_defs.h | 1 + 3 files changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/dc_dp_types.h b/drivers/gpu/drm/amd/display/dc/dc_dp_types.h index 519c3df78ee5b..95c275bf649bd 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_dp_types.h +++ b/drivers/gpu/drm/amd/display/dc/dc_dp_types.h @@ -727,7 +727,7 @@ struct dp_audio_test_data_flags { struct dp_audio_test_data { struct dp_audio_test_data_flags flags; - uint8_t sampling_rate; + uint32_t sampling_rate; uint8_t channel_count; uint8_t pattern_type; uint8_t pattern_period[8]; diff --git a/drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_cts.c b/drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_cts.c index df3781081da7a..32d5a4b143333 100644 --- a/drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_cts.c +++ b/drivers/gpu/drm/amd/display/dc/link/accessories/link_dp_cts.c @@ -775,7 +775,8 @@ bool dp_set_test_pattern( core_link_read_dpcd(link, DP_TRAINING_PATTERN_SET, &training_pattern.raw, sizeof(training_pattern)); - training_pattern.v1_3.LINK_QUAL_PATTERN_SET = pattern; + if (pattern <= PHY_TEST_PATTERN_END_DP11) + training_pattern.v1_3.LINK_QUAL_PATTERN_SET = pattern; core_link_write_dpcd(link, DP_TRAINING_PATTERN_SET, &training_pattern.raw, sizeof(training_pattern)); diff --git a/drivers/gpu/drm/amd/display/include/dpcd_defs.h b/drivers/gpu/drm/amd/display/include/dpcd_defs.h index aee5170f5fb23..c246235e4afec 100644 --- a/drivers/gpu/drm/amd/display/include/dpcd_defs.h +++ b/drivers/gpu/drm/amd/display/include/dpcd_defs.h @@ -76,6 +76,7 @@ enum dpcd_phy_test_patterns { PHY_TEST_PATTERN_D10_2, PHY_TEST_PATTERN_SYMBOL_ERROR, PHY_TEST_PATTERN_PRBS7, + PHY_TEST_PATTERN_END_DP11 = PHY_TEST_PATTERN_PRBS7, PHY_TEST_PATTERN_80BIT_CUSTOM,/* For DP1.2 only */ PHY_TEST_PATTERN_CP2520_1, PHY_TEST_PATTERN_CP2520_2, -- 2.43.0